[Bug sanitizer/59061] Port leaksanitizer

[earthdok at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59061

--- Comment #16 from Sergey Matveev <earthdok at google dot com> ---
(In reply to Kostya Serebryany from comment #11)
> > Easily doable of course, but we should create liblsan as shared
> > library in that case too.  What combination of those do you allow?  I mean,
> > is
> > -fsanitize=address,leak allowed (and only links -lasan?), etc.?
> 
> Sergey, please answer here (and make sure this is documented)

Under the current behavior -fsanitize=address,leak is equivalent to
-fsanitize=address.

We've considered other options, such as making -fsanitize=leak change the
default run-time behavior (currently the ASan runtime always has leak detection
runtime-disabled by default, whereas the standalone LSan runtime always has it
enabled). But we never arrived at anything sensible.